A student carried out a study to determine the effect of phosphorus on the growth of orchid plants. The student used aerophonic method, by spraying different fertilisers’ solution on orchid plant P and Q twice a week.
Diagram 3 shows the result after two months.
(a) Based on your observation, state one difference between orchid plant P and Q. [1 mark]
(b) In your opinion, what type of fertiliser is used on orchid plant P and Q? [2 marks]
(c) State one hypothesis for this study. [1 mark]
(d) Predict what will happen to the orchid plant P if the student replaced the fertiliser solution with tap water for three months. [1 mark]
(a) Orchid plant P has more/ longer roots.
Orchid P: Fertilisers with phosphorus
Orchid Q: Fertilisers without phosphorus
(c) Orchid plants need phosphorus for healthy growth/ more or longer roots/ big flower.
(d) Orchid plant P growth stunted.